usb to parallel adapter in windows 10

Carsten Busse 1 Reputation point
2022-08-30T19:03:38.933+00:00

I know this question arose with former windows versions as well,

but now I need an update for current windows versions.

I have an usb to parallel Port adapter usb vendor id 0x1a86 (QinHeng Electronics) and Product ID 0x7584 (CH340S).

This is from Logilink UA0054a bought in 2022

The device is detected and activateed automatically in windows AS A COM Port (ports 0x3f8 . 0x3ff, int 4, that would be ine for lpt)-- but seriously What?

This should have become lpt1 and not COMxy, what did I do wrong and (how) can I correct this?

This adapter is not to be used for a printer but for some bidirectional data transfer to very old devices.

Can someone help here? And if your answer is this will not work anyway don't bother to post here, i want serious answers only.

The adapter id is correct and windows should have set up an lpt port, not a com port.

Sidenote:

in linux the adapter is recognised as I would have expected it in windows

usblp 1-1.2:1.0: usblp0: USB Bidirectional printer dev 5 if 0 alt 1 proto 2 vid 0x1A86 pid 0x7584

so why is windows 10 believing that this is a com port, how can this be corrected?

ok, it is detected as com port because the used chip can do both

link to datasheet:
https://www.datasheetarchive.com/pdf/download.php?id=f0cdbe2f596f8693f2ce7cca22bd0652897e15&type=P&term=CH340DS2

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Windows: A family of Microsoft operating systems that run across personal computers, tablets, laptops, phones, internet of things devices, self-contained mixed reality headsets, large collaboration screens, and other devices.Hardware Performance: Delivering / providing hardware or hardware systems or adjusting / adapting hardware or hardware systems.
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  1. Dave Patrick 426.1K Reputation points MVP
    2022-09-03T21:52:00.307+00:00

    Maybe something here helps.
    http://www.wch-ic.com/products/CH341.html

    or email them here.
    http://www.wch-ic.com/services/technical_support.html#tech-mail

    --please don't forget to upvote and Accept as answer if the reply is helpful--

    1 person found this answer helpful.
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  2. Carsten Busse 1 Reputation point
    2022-09-03T22:11:56.267+00:00

    This does help a little, thanks,

    I am probably on the right track, but not yet at the target.

    Will update here if my assumptions produce something working.

  3. Carsten Busse 1 Reputation point
    2022-09-05T19:09:57.507+00:00

    Not yet, I will need little longer, but it is possible that there is simply no path with this chip.